Portsmouth · England

Fire Rated Sealant in Landport

Intumescent and fire-rated sealant around gaps, frames and service penetrations for Landport, backed by a one-year guarantee. Ask us for a quote.

  • Gaps flagged on a fire risk assessment
  • Open gaps behind door architraves
  • Fire seals that have cracked with movement

Need fire rated sealant in Landport?

Fire rated sealant in Landport

A fire seal relies on being installed the way it was tested: correct depth, correct backing and a product suited to the surfaces. That’s the part we focus on, one gap at a time. We work on linear gaps, pipe & cable gaps and plasterboard & masonry, and people most often call us about gaps around pipes and cables through fire-resisting walls and gaps where walls meet ceilings or slabs.

Commercial work around a smaller place like Landport normally means a pub, a shop, a school or small business units rather than office blocks. Each needs the same care with its sealant as any larger building.

All our work is covered by a 12-month guarantee, wherever you are in Portsmouth.

The Mr Mastic team in navy uniforms in front of three Mr Mastic vans
Location
Landport (PO1, PO2, PO5)
Wider area
Portsmouth
Cover
A year, on every job
Quote
A clear price before we start
Phone
0345 464 0079
Updated
26 October 2026

What we do, step by step

At the end, we look at the finished work together and explain the cure time. The work normally takes from a few hours to a few days, depending on the number of gaps and the access, depending on the size of the job. In a smaller place like Landport, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.

  1. We go through the gaps on your list or survey and check each one’s size and substrate.
  2. We remove any old or unsuitable filler and clean the gap.
  3. Backing or fill is fitted where the product’s tested detail calls for it.
  4. We apply the fire-rated or intumescent sealant to the specified depth and tool it.
  5. We record the locations and products used for your records.

Before we arrive

  • Move anything stored near the joints
  • Let us know about stairs, lifts or work at height
  • Mention if the joints have been sealed before

Get a quote

We quote each job on its own, so the first step is telling us about yours. Simply ring 0345 464 0079 or drop us an email and describe the job and send photos if you have them.

Get a quick quote

Related advice

What affects the quote in Landport

We do not publish a price list, because no two jobs are the same. What we look at:

  • Which sealant suits the joint
  • How many areas need sealing
  • How much there is to do
  • How easy the joints are to reach

Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will go through it with you.

Helping us quote

When you call or email, these details help:

  • Whether it’s a home or a business
  • How many joints, rooms or windows are involved
  • Any previous sealing or DIY work
  • Pictures of the joints, sent by email

Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before work begins.

Fire rated sealant in Landport: local notes

If you run a hotel, guest house or holiday let in a coastal place like Landport, heavy use in the busy months is hard on washroom and kitchen sealant, and any building work there should leave fire-rated joints made good. There are hotels and other places to stay in and around Landport. For hotels, a room-by-room programme keeps most rooms in use while the work goes on.

Managing a site like Ark Dickens Primary Academy? Then fire-stopping around service openings should be restored whenever new services go in. For landlords with property near Portsmouth & Southsea station, any gap left by new services in shared walls should be closed with a fire-rated product.

Landport is about 1 mile south-west of Portsmouth, in Portsmouth. If you need fire rated sealant in Landport, please call 0345 464 0079 or drop us an email for a quick quote. We’re based in Crawley and cover Portsmouth. Landport is one of 19 towns and villages in Portsmouth where we work for fire rated sealant.

All of PO1, PO2 and PO5 is covered for fire rated sealant, from the main roads to the quietest streets. We cover properties on Lake Road, Watts Road and Alfred Road and the roads around them. Other places close to Landport include Portsmouth (1 mile north-east), Fratton (1 mile east), Rudmore (1 mile north), Kingston (1 mile east) and North End (1 mile north). Further out, we also cover Wymering (3 miles north), Paulsgrove (3 miles north), Cosham (3 miles north), Drayton (3 miles north-east) and Farlington (4 miles north-east).

Local landmarks in Landport

Locally, jobs take us to homes and businesses close to The Painters Arms, St Edmund's Catholic School and Alexandra Park. Landport has its own railway station: Portsmouth & Southsea station. Other landmarks nearby include Royal Portsmouth Hospital (less than half a mile south-west) and Charles Dickens Birthplace Museum (less than half a mile north). Not far away are Milton Locks and Portsdown Hill.

Map of Landport © OpenStreetMap contributors

Looking after it afterwards

Looking after new joints is easy:

  • File the fire-stopping record where your assessor can find it
  • Tell trades working in the building that fire seals must be put back
  • Plan fire stopping into any work that goes through walls or floors
  • Include hidden areas like risers in routine checks

Any fire seal that’s cut or drilled needs resealing to its tested detail. New services through a sealed wall should include fire stopping in the plan.

A flagged gap shouldn’t wait for the next assessment. Have it sealed, then keep the record.

When it isn’t the sealant

Some problems need a builder, plumber or other trade rather than us:

  • Construction that doesn’t provide fire resistance on its own
  • Doors that aren’t fire doors in the first place
  • Issuing a fire rating or certificate for a building

Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before you book.

What we seal

  • Linear gaps
  • Service penetrations
  • Plasterboard & masonry
  • Door frames
  • Flats & HMOs
  • Pipe & cable gaps

DIY versus a professional finish

If you’ve already had a go yourself, that is fine. We cut it out and start again.

Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.

Your questions about fire rated sealant in Landport

Will you come out to Landport?

Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.

Do you work for landlords with property near Portsmouth & Southsea station?

Yes. We work for landlords and letting agents as well as homeowners. Just ring 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.

Can I do it myself?

Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.

How long does fire rated sealant take?

It depends on the size of the job, but most jobs take a few hours for a handful of gaps, and longer for a whole building. We’ll tell you when we quote.

What information do you need?

Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or drop us an email.

Do you seal gaps around fire door frames?

Yes. Gaps behind architraves are a common job for us. Doors, seals and closers need a door specialist.

Can you do several jobs on one visit?

Yes. Just list everything you need and you’ll get one quote.

Does someone need to be in?

It depends on the job. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.

How the job changes by surface

Plasterboard walls

Many fire-resisting walls in flats, offices and conversions are plasterboard. The sealant has to be one tested in plasterboard for each gap size.

Door frames

Our work is the joint between frame and wall. The door leaf, its seals and closer need a door specialist, and we’ll say if we spot a problem with them.

What we’re called out for in Landport

A lot of fire stopping is out of sight: in ceiling voids, service risers and behind boxing. Out of view, damage sits unnoticed until someone inspects.

Common reasons people contact us are:

  • Fire stopping disturbed by later work
  • Fire seals that have cracked with movement
  • New service routes left unsealed after building work
  • Ordinary sealant used where a fire-rated product was needed

If you look after a church, hall or community building such as Church of All Saints, gaps around pipes and cables are worth checking after any building work there.

What to look for in a quote

  • How the joint is cleaned and prepared
  • Is VAT in the price?
  • Whether they’re fully insured
  • What product goes in the joint

Our hiring checklist

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job